Lesser Space After Uninstalling CS3 Than Before?

It’s weird, but I need confirmation. Solutions are more than welcome. :)

I’ve installed and uninstalled Adobe CS3 Design Premium twice, and with each uninstall, the size on my hard disk seems to have gone down quite a bit (~600mb). I can’t confirm the actual size because in between the installation I’ve been adding some files on my computer but definitely not ~1.2gb worth.

After each uninstall, I’ll be emptying whatever contents (if any) in my recycle bin, cleaning up the temporary internet folders, and even defragmenting my registry and doing disk clean up. Tried to look into the Program Files folder to find any repository of temporary installation files that might have facilitated the installation, but to no avail. All that couldn’t get me back my lost space.

Anyone experienced this as well?